Missouri Window Tint Laws 2026
Missouri regulates front side windows at 35% VLT, with a 3% meter tolerance, for every vehicle type. Rear side windows and the rear window aren't addressed in the tint statute at all, so there's no darkness restriction there, but a separate general equipment law still requires a mirror if dark tint actually blocks the driver's view behind the vehicle.
Worth knowing: Missouri's tint statute never mentions mirrors, but a separate general equipment law still requires one if dark rear tint actually blocks your view behind the vehicle. Also, the medical tint permit is issued by the Missouri State Highway Patrol, not the Department of Public Safety as some sites claim.
Quick Reference
| Window | Legal Limit | Status |
|---|---|---|
| Windshield | Non-reflective, above AS-1 line | Restricted |
| Front side windows | 35% VLT minimum | Moderate |
| Back side windows | Any darkness | Not in statute |
| Rear window | Any darkness | Mirror may be required if view is blocked |
How Dark Can Your Tint Actually Be
35% VLT on the front gives Missouri drivers a genuinely dark, noticeable shade, and the built-in 3% tolerance means a meter reading of 32% is still treated as compliant. This applies the same way to sedans, SUVs, vans, and trucks, no vehicle-type split to track on the front windows.
RSMo 307.173 specifically names only the front sidewing vents, the windows immediately left and right of the driver, and the windshield. Rear side windows and the rear window simply don't appear in the tint statute, so there's no VLT percentage limit back there. That doesn't mean rear visibility is unregulated, though. A separate general equipment law, RSMo 307.170.4, requires a mirror that reveals the road behind whenever a vehicle is "so constructed or loaded" that the driver can't see back by looking through the glass. It's not written as a tint rule and never mentions windows or film, but dark enough rear tint that genuinely blocks the view would trigger it in practice, the same practical outcome most other states reach with an explicit tint-and-mirrors rule, just via a different, more general statute here.
The windshield only permits non-reflective tint above the AS-1 line. Reflectivity on the regulated front windows is capped at 35%, with the same 3% tolerance.
Legal vs Illegal
Legal
- ✓35%+ VLT film on front side windows, any vehicle
- ✓Any darkness on back side and rear windows, with a mirror maintaining rear visibility
- ✓Non-reflective tint above the AS-1 line on windshield
- ✓Historic-plated vehicles exempt from the front-window limit entirely
Illegal
- ✕Front side film reading below 32% VLT without a permit
- ✕Reflectivity above 35% on front side windows
- ✕Windshield tint below the AS-1 line
- ✕Operating under a permit issued to a different vehicle
The Mirror Rule: Not Tint-Specific, But Real
Missouri's tint statute doesn't require mirrors. But RSMo 307.170.4, part of the general vehicle equipment code, requires any vehicle "so constructed or loaded" that the driver can't see the road behind it to carry a mirror that reveals that view. This provision doesn't mention tint or film, it was written to cover obstructions generally, cargo, trailers, anything blocking the rear window. Genuinely dark rear tint that blocks visibility falls under the same logic. In practice, most vehicles satisfy this with the factory interior mirror alone if the side mirrors remain unobstructed, but it's worth understanding this isn't a tint-free zone the way "no restriction" can sound.
Fines and Penalties
A tint violation under RSMo 307.173 is generally treated as a Class C misdemeanor, with a fine around $75 plus a roughly $30 administrative fee for Missouri-registered vehicles.
| Violation | Classification | Typical Cost |
|---|---|---|
| Illegal front tint | Class C misdemeanor | ~$75 fine plus ~$30 administrative fee |
Medical Exemptions
How the permit works
Missouri's medical exemption is a real, formal state-issued permit, not just a doctor's note. An applicant obtains a physician's prescription, issued within the past year, stating a serious medical condition requires darker front-window tint. That prescription and the vehicle are then presented to the Missouri State Highway Patrol's Motor Vehicle Inspection Division. An inspector verifies the prescription, completes Form SHP-524 in triplicate, and affixes a sticker to the lower-left inside of the windshield plus a decal on the outside lower-left corner of the rear glass or bumper. If a permit covers more than one vehicle, only one prescription is required, but every vehicle must still be individually presented.
Who the permit covers
The permit isn't limited to the titleholder. It also covers a relative within the second degree by consanguinity or affinity who lives in the same household, spouse, grandparent, parent, sibling, niece, nephew, aunt, uncle, child, or grandchild. The permit is tied to the specific vehicle and does not transfer if that vehicle is sold.
Historic vehicle exemption
Separately, RSMo 307.173.5 exempts any vehicle registered with a historical license plate from the front-window tint requirement entirely, no permit or physician prescription needed.
Enforcement: What Actually Happens on the Road
Tint is a primary offense in Missouri. State Highway Patrol and local departments can stop a vehicle based on front-window tint appearance alone using a handheld meter. Since the statute doesn't address rear windows at all, enforcement attention concentrates almost entirely on the front sidewing vents and front door windows.
What Legal Tint Actually Costs in Missouri
With no VLT floor on the rear glass, many Missouri drivers pair a compliant 35% front with true limo-dark film on the back glass, keeping the factory interior mirror unobstructed to stay clear of the general mirror rule. Ceramic film is a common upgrade for UV and infrared rejection at any given VLT.
| Film Type | Sedan | SUV / Truck |
|---|---|---|
| Dyed film | $120 to $240 | $180 to $350 |
| Carbon film | $180 to $300 | $240 to $390 |
| Ceramic film | $210 to $410 | $300 to $560 |
Use the calculator to get an estimate specific to your vehicle before contacting any shop.
Free Tint Cost CalculatorFrequently Asked Questions
Tint Enforcement by City
Kansas City
Kansas City PD and Missouri State Highway Patrol both enforce, I-70 and I-35 are commonly cited corridors near the Kansas border.
St. Louis
I-70, I-64, and I-44 corridors see regular patrol presence, St. Louis PD carries meters as standard equipment.
Springfield
I-44 corridor enforcement, standard statewide 35% front rule applies.
Columbia
I-70 corridor, university-area traffic density adds to routine enforcement stops.
Jefferson City
State capital, home to the Missouri State Highway Patrol's Motor Vehicle Inspection Division that processes SHP-524 permits.
Related Reading
Window Tint Laws by State
Missouri tint law is one piece of a bigger picture. Every state sets its own VLT limits, and they vary more than most drivers expect. Browse the full directory below.
Missouri tint law reference: RSMo 307.173 and 11 CSR 30-7.010 (medical permit procedure). Laws can change. Always verify current requirements with Missouri State Highway Patrol before getting your windows tinted.